Congenital anemia reveals distinct targeting mechanisms for master transcription factor GATA1

Leif S. Ludwig, Caleb A. Lareau, Erik L. Bao, Nan Liu, Taiju Utsugisawa, Alex M. Tseng, Samuel A. Myers, Jeffrey M. Verboon, Jacob C. Ulirsch, Wendy Luo, Christoph Muus, Claudia Fiorini, Meagan E. Olive, Christopher M. Vockley, Mathias Munschauer, Abigail Hunter, Hiromi Ogura, Toshiyuki Yamamoto, Hiroko Inada, Shinichiro NakagawaShuichi Ohzono, Vidya Subramanian, Roberto Chiarle, Bertil Glader, Steven A. Carr, Martin J. Aryee, Anshul Kundaje, Stuart H. Orkin, Aviv Regev, Timothy L. McCavit, Hitoshi Kanno, Vijay G. Sankaran

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Master regulators, such as the hematopoietic transcription factor (TF) GATA1, play an essential role in orchestrating lineage commitment and differentiation. However, the precise mechanisms by which such TFs regulate transcription through interactions with specific cis-regulatory elements remain incompletely understood. Here, we describe a form of congenital hemolytic anemia caused by missense mutations in an intrinsically disordered region of GATA1, with a poorly understood role in transcriptional regulation. Through integrative functional approaches, we demonstrate that these mutations perturb GATA1 transcriptional activity by partially impairing nuclear localization and selectively altering precise chromatin occupancy by GATA1. These alterations in chromatin occupancy and concordant chromatin accessibility changes alter faithful gene expression, with failure to both effectively silence and activate select genes necessary for effective terminal red cell production. We demonstrate how disease-causing mutations can reveal regulatory mechanisms that enable the faithful genomic targeting of master TFs during cellular differentiation.

Original languageEnglish (US)
Pages (from-to)2534-2546
Number of pages13
JournalBlood
Volume139
Issue number16
DOIs
StatePublished - Apr 21 2022
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology

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